Genetic Variability in the microRNA Binding Sites of and and Risk of Breast Cancer in Colombian Women.

BACKGROUND

Genetic variants in microRNA (miR) binding sites affect the regulation of miR-dependent gene expression and have been linked to the risk of a variety of cancers including breast cancer (BC). Most BC risk variants had been identified in women of European and Asian ancestry, but genetic data for Hispanic women are scarce. Here, we investigate the association between six variants in miR binding sites and BC risk in Colombian women.

METHODS

We genotyped miR binding site variants in the and genes in 1022 BC cases and 1023 controls from the Colombian breast cancer case-control (Col-BCCC) study using matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS). Multiple logistic regression and permutation techniques were applied to assess the association between genetic variants and BC risk.

RESULTS

We found no evidence of association between any of the six miR binding site variants and overall or estrogen receptor subtype-specific BC risk in Colombian women.

CONCLUSION

Our findings may point to ethnic differences in the association between genetic variability in miR binding sites and breast cancer risk.